Calendar invitations sent to iphone user fail

When I generate a calendar invitation in ACT (2011 pro) and have it send invitations via email, users on iphones do not receive the invitation. Even though the invite goes through outlook to be sent, they still fail if they originated in ACT. If I create an invitation in Outlook and send it - it is fine.

Usually the receiving user doesn't even see it. Iphone users who have replaced the native iphone calendar app with the Google calendar app seem to be fine.

Is there a known issue that iphone (4s) users running the native calendar / email apps cannot receive and process calendar invites that originate in ACT?

===========================Ken WiensProject and Program Managerwww.kgw-consultants.com============================

Re: Calendar invitations sent to iphone user fail

Just to be clear here - The iphone is not being sync'ed - there is no sync issue at play. The iphone is just supposed to receive an invitation to a meeting via email and put it in the calendar. The iphone user is not using ACT, they are just someone I am inviting to a meeting. Just like I send an outlook meeting invitation to multiuple invitees. The invitees mail clients, be it outlook, or any other email client recognizes it as an invitation and lets the user accept, decline or tentatively accept it.

If I send an invitation from outlook to an iphone user they get the invitation and can respond accordingly. That same user, however will not receive the invitation if it was generated from Act and then went through my outlook before heading off to the invitees.

===========================Ken WiensProject and Program Managerwww.kgw-consultants.com============================